CN1328715C - Additional data channel in pregroove - Google Patents
Additional data channel in pregroove Download PDFInfo
- Publication number
- CN1328715C CN1328715C CNB2003801079398A CN200380107939A CN1328715C CN 1328715 C CN1328715 C CN 1328715C CN B2003801079398 A CNB2003801079398 A CN B2003801079398A CN 200380107939 A CN200380107939 A CN 200380107939A CN 1328715 C CN1328715 C CN 1328715C
- Authority
- CN
- China
- Prior art keywords
- groove
- record carrier
- information
- track
- pregroove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00745—Sectoring or header formats within a track
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
Abstract
A record carrier is described for recording information by writing marks in a track. The record carrier has a pregroove (14) indicating the position of the track. The pregroove exhibits a wobble and in addition thereto a pregroove modulation (13) constituted by variations of a physical parameter related to the shape of the pregroove, e.g. width or depth. The marks are detectable during scanning the track via a beam of radiation by a first type of variations of the radiation, e.g. by changes of reflected radiation. The pregroove modulation (13) is also detectable by variations of said first type, whereas the wobble is detectable during said scanning by a second type of variations of the radiation.
Description
The present invention relates to a kind of being used for by mark being write the record carrier that track comes the type write of recorded information.
The invention still further relates to a kind of equipment and a kind of method that is used for providing information that is used to scan described record carrier via described record carrier.
A kind of record carrier that is used for recorded information is known in US 5,210,738.Described record carrier comprises gathering sill, and so-called pre-groove is used to show the position of track, in described track by recording optically on readable mark adopt predefined mode to represent described information.Make described pre-groove bending by track period migration (being also referred to as swing) in the horizontal.Described swing changes on the cycle according to first additional information, and changes on amplitude according to second additional information.Scanning device has to be used to produce and is used for the head of radiation laser beam of scan track.Detect described mark in described scan period according to the variation of the reflectivity of institute's scanning of a surface.Detect the variation of the intensity of institute's reflected radiation by main detector system.In addition, described scanning device has assisted detector, is used for producing tracking servo signal so that detect the space bias of described head with respect to track based on described swing.Described tracking servo signal is used to control driver so that locate described head with respect to track.Detect the variation of described hunting period so that obtain first supplementary, for example address information.Can detect the variation of described wobble amplitude so that obtain second supplementary via assisted detector.The problem of known record carrier is that the amount of described second supplementary is restricted.The variation in cycle and oscillation amplitude change all influence bending, and this is because the lateral attitude of modulating described pre-groove aspect two of cycle and amplitudes.These two variations must divide based on the signal from assisted detector.
Therefore the purpose of this invention is to provide and a kind ofly be used to adopt more easily that mode provides recording of information carrier, scanning device and method via additional data channel to the user.
According to a first aspect of the present invention, described purpose is by coming the record carrier of the type write of recorded information to realize by mark being write track, scan according to first kind radiation variation via radiation laser beam described track during described mark be detectable, described record carrier comprises pre-groove, be used to show the position of described track, described pre-groove is showed by described pre-groove and is being transverse to the swing that the displacement on the direction longitudinally of described track constitutes, and described pre-groove is showed the pregroove modulation that the variation by the physical parameter relevant with described pre-groove shape constitutes, in the described swing of described scan period that changes according to second type of radiation is detectable, and is being detectable according to the further described pregroove modulation of described scan period that changes of the described first kind.
According to a second aspect of the present invention, described purpose is realized by the equipment that is used for via radiation laser beam comes scanning record carrier to get on the right track, described equipment comprises head, be used to provide described light beam, front end unit, be used to produce the main sweep signal, so that in the mark and the pregroove modulation that detect according to the described scan period of first kind radiation variation in the described track, and be used to produce the sub-scanning signal, so that the described scan period wobble detection that is changing according to second type of radiation, also comprise the pre-groove demodulating unit, be used for obtaining the additional information of encoding according to pregroove modulation from the main sweep signal.
According to a third aspect of the present invention, described purpose is by providing the method for information to realize via record carrier to the user, described method comprises step: record carrier as defined above is provided, and the information that is provided on record carrier, writing down according to pregroove modulation.
The effect of this scheme is the shape that pre-groove has variation, and for example the degree of depth or width are modulated this change of shape so that the coding secondary information.Change the variation that shape causes institute's reflected radiation and pregroove modulation, these change as with because the variation that record mark causes is detectable.This has following benefit, does not promptly have the equipment that is used for obtaining according to described swing the assisted detector of information, and described pregroove modulation also is detectable, such as at the equipment that only is used for scanning (in advance) recording disk.In addition, but the user can be based on coming canned data according to pregroove modulation available supplementary on the write record carrier, for example particular content.Should be noted that in addition not to have the main information on the record carrier under the situation of pregroove modulation (obviously not being used to the additional data from described pregroove modulation) by existing scanning device, and this provides back compatible.
The present invention is also based on following understanding.Read signal by the first kind variation that mark causes in the high-frequency range generation, this is because the data capacity of described mark is the main purpose of design of data-storage system.The inventor finds out that the described at least lower frequency part that reads signal spectrum can modulate according to the variation of pre-groove.Using sophisticated signal to handle can be separated the variation of the first kind in reading signal with described other variation of reading signal.On the contrary, as at US 5,210, in 738 further the amplitude of the described swing of modulation can be subjected to the restriction that the modulation in cycle is Already in swung, the described cycle has basically than reading the lower frequency range of signal.In addition, can be used for handling the variation of second type and have limited frequency range usually so that produce the detector system and the signal Processing of servo tracking signal.Thereby, the additional data channel with larger data capacity can be used according to according to pregroove modulation of the present invention.
In the embodiment of record carrier because the first kind that causes of described mark changes basically in the first frequency scope, and since the first kind that described pregroove modulation causes change basically in different frequency ranges.This has following benefit, promptly can be easily filters because the caused variation of pregroove modulation from being used for detecting the signal that reads that the described first kind changes.
At record carrier in one embodiment because second type that causes of described swing changes basically in the hunting frequency scope, and since the first kind that described pregroove modulation causes change basically in different frequency ranges.This has following benefit, has promptly reduced the interference between wobble modulation and pregroove modulation or crosstalks.
In the embodiment of record carrier, described pregroove modulation is represented programme information, will perhaps represent the content information of at least a portion audio or video program by the visit information of the information of mark, audio or video process software record especially for visit.This has following benefit, and promptly the user can maybe store or obtain user profile based on described programme information when using described programme information.
In the embodiment of described equipment, main detector means comprises filter element, is used for from filtering frequency range by the signal that reads that primary detector detected, and described frequency range is set so that filter because the first kind that described pregroove modulation causes changes.This has following benefit, promptly can easily isolate from read signal and/or delete because the variation that pre-groove causes.
In other claim, provided further preferred embodiment according to present device.
With reference to the following describes in the book with the embodiment of formal description for example, and with reference to the accompanying drawings, these and other aspect of the present invention will further be illustrated and be become apparent, wherein
Fig. 1 a shows disc-like record carrier,
Fig. 1 b shows the xsect of record carrier,
Fig. 1 c shows the example of track wobble,
Fig. 1 d shows the swing with pregroove modulation,
Fig. 2 shows the scanning device with pregroove modulation detection,
Fig. 3 schematically show do not write and write magnetic track and
Fig. 4 shows reflection profile along cross-section orbital direction.
In the accompanying drawings, has identical Reference numeral corresponding to the element of describing element.
Fig. 1 a shows the disc-like record carrier 11 with track 9 and center pit 10.Arrange described track 9 according to the circle of spiral pattern, described circle constitutes substantially parallel track on Information Level.But record carrier can be the CD with record type Information Level.The example of recordable disc sheet is CD-R and CD-RW and DVD+RW.But the track on the record carrier of record type 9 by during the manufacturing gap record carrier in advance the track structure of compacting show pre-groove for example.Representing the information that write down by detectable mark on the optics of described track record on the Information Level.Described mark constitutes according to the variation of first physical parameter, and has whereby and different optical properties, for example Fan She variation around it.
But Fig. 1 b is the xsect that the line b-b of the record carrier 11 of edge record type is intercepted, and wherein transparent substrates 15 has recording layer 16 and protective seam 17.Track structure for example is made of pre-groove 14, and described pre-groove 14 can be advanced read/write head in scan period along track 9.Can be embodied as indentation (indentation) or protuberance (elevation) to pre-groove 14, or can constitute by material with optical property different with the material of described pre-groove.Described pre-groove can be advanced read/write head in scan period along track 9.Track structure can also be formed by the sub-track that rule distributes, and described sub-track regularly makes servosignal occur.Described record carrier is intended to carry real-time information, for example video or audio-frequency information, and perhaps out of Memory is such as computer data.
Fig. 1 c shows the example as the track wobble as indicated in the element 12 in Fig. 1 a.The described cycle that illustrates the track lateral attitude changes, and is also referred to as swing.Described variation appears in the assisted detector additional signal, for example in the satellite spot detector in the scanning device head.Described swing for example is a frequency modulation, and in described modulation coding site information.Can be at US 4,901, find the comprehensive description in the CD system write that comprises the dish information that this mode of employing is encoded, shown in Fig. 1 c among 300 (PHN 12.398) and the US 5,187,699 (PHQ 88.002) to the prior art swing.As discussed below, according to the present invention, described pre-groove has the pregroove modulation that is made of the physical parameter variation, and described physical parameter is relevant with the shape of pre-groove.
Fig. 1 d shows the swing with pregroove modulation.The figure shows swing pre-groove 14 with pregroove modulation 13.Change shape according to the additional information signal that will encode as the pre-groove of partial cross-section shape.In shape this change influence scan period from track institute radiation reflected, and whereby can be detected.As shown in the figure, modulate the width of described pre-groove according to the digital modulation pattern.
Flute profile (width, the degree of depth) modulation along described track can be used for producing additional data channel.Unrecorded then disc (R or RW type) comprises main data channel.Should be noted that and can use any modulating mode, for example slowly change the simulation model of width, or have the modulating mode of wide variety for ' constant long pulse ', encode additional data is come in its position according to described pulse.Additional data channel can be to transfer long, frequency modulation, amplitude modulation, phase modulation or any other modulation scheme, even preferably it is appended on the high-frequency data.Can separate with additional data channel in order to make mainly, described additional data channel has obviously the position long (promptly using than low spatial frequency) greater than master's (high frequency) channel, and preferably, uses the changes in amplitude littler than high frequency channel.The logical frequency filter of band can be used for separating low and high frequency data pattern.The difference on the frequency that should be noted that factor 10 makes additional data channel account for 10% of main channel data capacity easily.Use the sophisticated signal Processing Algorithm can further increase data capacity.The solution of being advised comprises the amplitude of additional modulation HF signal.This can finish under the situation of the interior perhaps quality of the described HF data of considerable influence not.Thereby certainly under the situation of not obtaining excessive data, still can rely on existing systems to read dish in conjunction with this additional data flow.
In the embodiment of record carrier, change the degree of depth of described pre-groove according to modulating mode.The further combination of embodiment with width and degree of depth, or any other suitable alteration of form, described alteration of form can influence the radiation reflected from described track institute.Should be noted that change that reflection produces should be to because the similar type of change of the caused reflection of mark of coding essential record information, promptly at least can with because the caused reflection type of swing changes differentiation detects.Reflected radiation with same type changes permission single detector system and front-end circuit generation sweep signal, and described sweep signal is applicable to obtains main information and supplementary.
In order to make this record carrier, make master.During main procedure, write described swing by laser beam recorder by the little lateral excursion of utilizing described track nominal centre position, and the laser power intensity of modulation main laser bundle is so that provide the pre-groove shape modulation.
During by the scanning sense data, it is detectable that described swing changes via second type of radiation, described second type of radiation changes the variation such as intensity in the folded light beam xsect, and it can be detected so that produce tracking servo signal by detector portion or additional detector.According to above-mentioned CD-R and CD-RW system, the swing that detects tracking servo is known.
Should be noted that supplementary can be used for the control information of handling at scanning device or principal computer, for example be used for the code of Visitor Logs information, the identifier that is used to support to copy control, anti-pirate information and other access mechanism.Control information in the additional data channel can represent to be used to prevent the unique identification code or the watermark of illegal copies.In one embodiment, additional information can be used to described user.Described additional information can be a software program, for example is used for processing, decompression or editor's audio or video material, or the software program of ' freeware ' type version, is used to make the function of the described software of user trial.In one embodiment, described additional information is the audio or video content information, such as the film clips of film or the MP3 version of some audio frequency.The user may be interested in the film or the audio frequency of full release.Supplier can for example can use this full release via the internet, then can described version download to record carrier and the record thereon.In fact control from record carrier and obtain and visit full release via being also included within access code in the described pregroove modulation.For example, supplier can provide the film clips or the software program of several films to the user, for example 5, and only allow user record one of them.Described then user is that a film is paid when buying the recordable disc sheet.Thereby the record carrier with one or more samples of content information is sold by content provider, and particularly via the network as internet and so on the full release of used described sample can be used for the user.
Fig. 2 shows the scanning device with pregroove modulation detection.Described equipment has the device that is used for the track on the scanning record carrier 11, and described device comprises the driver element 21 that is used for rotary recording carrier 11,22, is used for coming with respect to described track the servo unit 25 of positioning head 22, and control module 20.Described 22 optical system that comprises known type is used to produce radiation laser beam 24, guides described radiation laser beam 24 to focus on radiant 23 on the track of described record carrier information layer by optical element.Described radiation laser beam 24 is produced by the radiation source of for example laser diode and so on.Described head comprises that also (not shown) focuses on driver, is used for moving along the optical axis of described light beam the focus of described radiation laser beam 24, also comprises the tracking driver, and accurate anchor point 23 is used for making progress in the footpath of orbit centre.Described tracking driver can comprise the coil that is used to move radially optical element, or as the angle of selecting can be configured to change reflecting element.Drive described focusing and follow the tracks of driver by driver signal from servo unit 25.In order to read, common type detector by for example four-quadrant diode and so in 22 detects by the Information Level radiation reflected, so that produce detector signal with front end unit 31 couplings, described front end unit 31 is used to produce various sweep signals, comprises main sweep signal 33 and rub-out signal 35 so that follow the tracks of and focus on.Rub-out signal 35 and servo unit 25 are coupled so that control described tracking and focus on driver.The main sweep signal of being handled by the reading processing unit 30 of common type 33 is so that obtain information, and described reading processing unit 30 comprises detuner, removes formatter and output unit.
Described control module 20 gated sweeps and obtain information, and can be configured to receive order from user or principal computer.Via the control line 26 of for example system bus and so on described control module 20 is connected to other unit in described equipment.Described control module 20 comprises control circuit, and for example microprocessor, program storage and interface are used to carry out process as described below and function.Can also be embodied as state machine in the logical circuit to described control module 20.In one embodiment, control module is carried out and is handled additional information so that visit the function of main information as noted above.
Described equipment comprises pre-groove demodulating unit 32, is used for the pregroove modulation of following detection in sweep signal.Receive main sweep signal 33 from front end unit 31.For example delete owing to the composition in signal 33 that main information flag produced, and isolate because the composition that pregroove modulation produced by filter element 34 with low pass or passband function.The timing that is used for reconstruct auxiliary signal data clock recovers to be based on described wobble frequency or pregroove modulation itself.In one embodiment, regularly recover to be based on the data clock that obtains for master data.The data bit that can application of synchronized detects auxiliary data.In one embodiment, pregroove modulation has channel code and/or error-correcting code, and described detecting unit has channel code detuner and error correction unit.
Reading processing unit comprises the demodulator circuit of picture limiter and so on, is used for being demodulated into digital place value reading signal.Should be noted that fast limiter under situation about further not revising, particularly when aid mark causes relatively little amplitude difference (for example 15%), can adapt to by the caused variation of described aid mark.In one embodiment, reading processing unit 30 is suitable under the situation that the pregroove signal composition that is produced by pregroove modulation is arranged, certification mark from the main sweep signal.For example described unit can comprise filter element, is used for blocking basically the frequency range of described pregroove signal composition.In one embodiment, the coupling of described reading processing unit and pregroove modulation unit is so that receive the pregroove signal that is used to represent the pregroove modulation that detected.Described pregroove signal and main sweep signal combination, for example subtract each other, so that eliminate described pregroove signal composition basically.As selection, the limiter grade of bit detector unit can be suitable for the average reflection level that is detected that influenced by pregroove modulation.
In one embodiment, front end unit 31 has combinational circuit, and it adds from the signal of several detecting devices so that produce image signal as sweep signal, and described image signal is represented from the radiant quantity via the radiation laser beam of track reflection.In one embodiment, described combinational circuit combination is from the signal of each available detector member.The sort signal of the total reflection of expression can be coupled with pre-groove demodulating unit 32 discretely.
In one embodiment, described equipment has the device that is used at recording information, its type can be can write or can write for example CD-R or CD-RW, or DVD+RW or BD again.Described equipment comprises and writes treating apparatus, is used to handle described input information and produces write signal so that drive described 22, and described device comprises input block 27 and modem devices, and described modem devices comprises formatter 28 and modulator 29.For writing information, control described radiation so that creating detectable mark on the optics on the recording layer.Can adopt form readable on any optics to obtain described mark, for example when the form that described label record is obtained in the material such as dyestuff, alloy or phase-change material the time, the form that for example has the zone that is different from its reflection coefficient on every side, perhaps the form that obtains when described label record is in magneto-optic memory technique for example has the form in the zone that is different from its polarised direction on every side.
Write and read and be used for that the information of record and format, error recovery and chnnel coding rule is known in the art on CD, for example according to CD or dvd system.In one embodiment, input block 27 comprises compression set, be used for such as analogue audio frequency and/or video, or the input signal of digital unpressed audio/video.In mpeg standard, described the suitable compression set that is used for video, in ISO/IEC 11172, defined MPEG-1, and in ISO/IEC 13818, defined MPEG-2.As selection, can be according to this standard described input signal of encoding.
Fig. 3 schematically shows and does not write and write track.Do not write track (vertical view) 41 and have first 45 and second portion 46, thus described first 45 because pregroove modulation has the big degree of depth, and second portion 46 has normal depth.Provided the reflection that is produced by curve 42.Darker part 45 produces the reflection that weakens.The common sector of described track is illustrated as writing magnetic track (vertical view) 43 after writing the general data mark.Curve 44 shows the reflection that is produced.The darker part 47 of described track produces different reflective-modes 48.Be that the degree of depth of described pre-groove produces except that from the interference from the light of pre-groove and convex region part the track effectively.Described interference causes the changes in amplitude of the radiation that detected.If run into two groove depths, when being positioned at orbit centre, analyzing spot produces two reflection level so basically.
User record is passed the high-frequency data in described pre-groove superficial part and deep.After user data, additional data channel exists as reflection modulation, as showing in curve 44.
Fig. 4 shows reflection profile along cross-section orbital direction.Provided radial location in the horizontal direction, promptly be transverse to the space bias that reads on the direction of described track a little, 0 corresponding to being the radiant at center with the pre-groove, and-0.5 and 0.5 corresponding to the point on convex region between two pre-grooves just.Use 40% groove duty cycle (ratio of width and track space), the top result who illustrates as the depth of modulation of the pre-groove of the function of radial location.Curve 51 shows the reflection level (use blue laser) of the pre-groove of the 25nm degree of depth, and curve 52 shows the reflection level of the pre-groove of the 35nm degree of depth.Arrow 53 shows the difference of reflection level, and it can be used for using central point to detect described pre-groove depth modulation.The influence of 30nm groove depths to the pre-groove width modulated used in following illustrating for two different groove widths.Curve 54 shows 30% groove duty cycle, and 50% groove duty cycle produces power 56 basically.It should be noted that in actual environment average reflection should not be a power, this is because described pre-groove still has the basic function that produces the trail-and-error signal when described point leaves the center.Arrow 55 shows the difference of reflection level, and it can be used for using central point to detect described pre-groove width modulated.The figure shows the differentiable variation that two kinds of methods all cause (on groove) reflection, can detect the data channel of low frequency.
Although explained the present invention substantially according to the embodiment that uses CD based on the change of reflection, but the present invention also is applicable to other record carrier, such as rectangular optical cards, the storage system of magneto-optical disc or any out of Memory type, but it has the pattern of using in advance on the write record carrier.It should be noted that, speech in the document ' comprises ' does not get rid of those other elements except that listing or the existence of step, and the speech before element " " or " a kind of " do not get rid of the existence of a plurality of this elements, any reference symbol does not limit the scope of described claim, the present invention can realize by means of hardware and software, and several ' devices ' or ' unit ' can be represented by identical hardware or software item.In addition, scope of the present invention is not limited to described embodiment, and the invention reside in above-mentioned each novel feature or described combination of features.
Claims (10)
1. be used for by mark being write the record carrier that track comes the type write of recorded information, described be marked at via radiation laser beam according to first kind radiation variation come scan track during be detectable,
Described record carrier comprises the pre-groove that shows described orbital position, described pre-groove has been showed by transverse to the swing that the displacement of pre-groove constitutes on the direction longitudinally of described track, and described pre-groove has been showed the pregroove modulation (13) that the variation by the physical parameter relevant with described pre-groove shape constitutes
Described swing is detectable in the described scan period that changes according to second type of radiation, and described pregroove modulation is detectable in the described scan period that further changes according to the described first kind,
Because it is in the first frequency scope that the first kind that described mark causes changes, it is characterized in that because the first kind that causes of described pregroove modulation changes is that this scope is used for changing the additional information of encoding with the first kind of described pregroove modulation in the second different frequency range.
2. record carrier as claimed in claim 1, wherein said first kind variation is the variation that is used for the reflection level of the track of radiation.
3. record carrier as claimed in claim 1, second type that causes owing to described swing changes in the hunting frequency scope, and the first kind that causes owing to described pregroove modulation changes in different frequency ranges.
4. record carrier as claimed in claim 1, the described variation of wherein relevant with described pre-groove shape physical parameter is made of the degree of depth of described pre-groove or the variation of width.
5. record carrier as claimed in claim 1, wherein said pregroove modulation represent to be used to control the control information that recovers described information.
6. record carrier as claimed in claim 1, wherein said pregroove modulation is represented programme information, will perhaps represent the content information of at least a portion audio or video program by the information of mark, audio or video process software record especially for visit.
7. be used for equipment via the track of radiation laser beam (24) scanning on record carrier (11), described record carrier comprises the pre-groove (14) that shows described orbital position, described pre-groove has been showed by transverse to the swing that displacement constituted of pre-groove on the direction longitudinally of described track, and described pre-groove has been showed the pregroove modulation that variation constituted (13) by the physical parameter relevant with described pre-groove shape
Described equipment comprises:
-head (22) is used to provide light beam, and
-front end unit (31), be used for producing main sweep signal (33) so that in the mark and the pregroove modulation that detect according to the described scan period of first kind radiation variation at described track, and be used to produce sub-scanning signal (35) so that detect described swing in the described scan period that changes according to second type of radiation
Because it is in the first frequency scope that the first kind that described mark causes changes, and it is characterized in that described equipment comprises:
-pre-groove demodulating unit (32) is used for obtaining the additional information of encoding from main sweep signal (33) in the first kind from the described pregroove modulation of second frequency scope changes, and described second frequency scope is different from the first frequency scope.
8. equipment as claimed in claim 7, wherein said pre-groove demodulating unit (32) comprises filter element (34), is used for filtering the second frequency scope from main sweep signal (33).
9. provide the method for information via record carrier to the user, described method comprises step:
-provide as the described record carrier of writing type of arbitrary claim of claim 1 to 6,
The information that is provided on record carrier, writing down according to pregroove modulation.
10. method as claimed in claim 9, wherein said record carrier have one or more samples of content information, and the described information that is provided for writing down comprises the full release that makes the user can particularly use described sample via network.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02080591.7 | 2002-12-30 | ||
| EP02080591 | 2002-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1732517A CN1732517A (en) | 2006-02-08 |
| CN1328715C true CN1328715C (en) | 2007-07-25 |
Family
ID=32668864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801079398A Expired - Fee Related CN1328715C (en) | 2002-12-30 | 2003-12-04 | Additional data channel in pregroove |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20060114765A1 (en) |
| EP (1) | EP1581935B1 (en) |
| JP (1) | JP2006512707A (en) |
| KR (1) | KR20050091760A (en) |
| CN (1) | CN1328715C (en) |
| AT (1) | ATE369604T1 (en) |
| AU (1) | AU2003283776A1 (en) |
| DE (1) | DE60315511T2 (en) |
| TW (1) | TW200423082A (en) |
| WO (1) | WO2004059623A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2008144408A (en) * | 2006-04-11 | 2010-05-20 | Конинклейке Филипс Электроникс Н.В. (Nl) | OPTICAL DISCS WITH IDENTIFICATION CODE |
| TWI347596B (en) * | 2007-01-11 | 2011-08-21 | Ind Tech Res Inst | Optical recording carrier, signal generating apparatus, information recording method, and information reading apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0786767A2 (en) * | 1996-01-26 | 1997-07-30 | Sharp Kabushiki Kaisha | Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium |
| CN1236467A (en) * | 1997-05-28 | 1999-11-24 | 三洋电机株式会社 | Recording medium and reproducing apparatus therefor |
| US20020060965A1 (en) * | 1997-06-19 | 2002-05-23 | Minoru Tobita | Optical disc and optical drive |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4789863A (en) * | 1985-10-02 | 1988-12-06 | Bush Thomas A | Pay per view entertainment system |
| NL8800151A (en) * | 1988-01-22 | 1989-08-16 | Philips Nv | METHOD AND APPARATUS FOR RECORDING AN INFORMATION SIGNAL |
| DE69729606T2 (en) * | 1996-07-09 | 2005-07-07 | Sharp K.K. | Optical disk with distributed sweep sections, manufacturing method and method for recording and reproduction |
| AU2001269091A1 (en) * | 2000-07-07 | 2002-01-21 | Koninklijke Philips Electronics N.V. | Record carrier, playback apparatus and information system comprising a record carrier and a playback apparatus |
| BRPI0408628A (en) * | 2003-03-24 | 2006-03-28 | Koninkl Philips Electronics Nv | recording carrier of a writable type, and device for sweeping a track over a recording carrier |
-
2003
- 2003-12-04 EP EP03775757A patent/EP1581935B1/en not_active Expired - Lifetime
- 2003-12-04 WO PCT/IB2003/005924 patent/WO2004059623A1/en active IP Right Grant
- 2003-12-04 AT AT03775757T patent/ATE369604T1/en not_active IP Right Cessation
- 2003-12-04 CN CNB2003801079398A patent/CN1328715C/en not_active Expired - Fee Related
- 2003-12-04 JP JP2004563448A patent/JP2006512707A/en not_active Withdrawn
- 2003-12-04 US US10/540,703 patent/US20060114765A1/en not_active Abandoned
- 2003-12-04 DE DE60315511T patent/DE60315511T2/en not_active Expired - Fee Related
- 2003-12-04 AU AU2003283776A patent/AU2003283776A1/en not_active Abandoned
- 2003-12-04 KR KR1020057012284A patent/KR20050091760A/en not_active Application Discontinuation
- 2003-12-26 TW TW092137162A patent/TW200423082A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0786767A2 (en) * | 1996-01-26 | 1997-07-30 | Sharp Kabushiki Kaisha | Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium |
| CN1236467A (en) * | 1997-05-28 | 1999-11-24 | 三洋电机株式会社 | Recording medium and reproducing apparatus therefor |
| US20020060965A1 (en) * | 1997-06-19 | 2002-05-23 | Minoru Tobita | Optical disc and optical drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006512707A (en) | 2006-04-13 |
| DE60315511T2 (en) | 2008-04-17 |
| US20060114765A1 (en) | 2006-06-01 |
| WO2004059623A1 (en) | 2004-07-15 |
| ATE369604T1 (en) | 2007-08-15 |
| AU2003283776A1 (en) | 2004-07-22 |
| KR20050091760A (en) | 2005-09-15 |
| TW200423082A (en) | 2004-11-01 |
| EP1581935A1 (en) | 2005-10-05 |
| DE60315511D1 (en) | 2007-09-20 |
| CN1732517A (en) | 2006-02-08 |
| EP1581935B1 (en) | 2007-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CZ20003524A3 (en) | Record carrier, apparatus for recording to the carrier and/or playing back from the carrier and process for producing such record carrier | |
| US20030048709A1 (en) | Optical data storage medium and methods for reading and writing such a medium | |
| CN1328715C (en) | Additional data channel in pregroove | |
| CN1864209A (en) | Optical disc having focus offset area | |
| CN100411029C (en) | Optical disc having combined ROM/RAM area | |
| CN100383865C (en) | Multilayer optical disc having pregroove modulation. | |
| CN1333392C (en) | Reproduction-only recording medium | |
| EP1209679A2 (en) | Recording apparatus and method for optical recording medium | |
| CN1327414C (en) | Additional data channel in between marks | |
| CZ299013B6 (en) | Record carrier and recording and/or playback device | |
| RU2219596C2 (en) | Data medium incorporating auxiliary information, reader, and method for manufacturing such data medium | |
| CN100458962C (en) | Method for recording a lead-out on an optical disc | |
| US20090225638A1 (en) | Recording system having improved prepit detection | |
| JP2001076349A (en) | Optical recording medium and its manufacture | |
| JP2002260244A (en) | Optical recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |